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Round|Lab Grown|IGI

1.03ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG662408428

Shape and cutting style on the report: Round brilliant

Certificate IGI LG662408428

Diamond specifications and retailer prices

From £166 GBP
$221 USD
As of October 30, 2026
Save £725 GBP (81%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £991 GBP at Brilliant Earth · As of October 21, 2026
View at Brilliant Earth

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG662408428 or 662408428. Listed at 25 retailers as of October 30, 2026, with a 437% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG662408428
Dimensions6.48 × 6.52 × 3.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.48 mm6.52 mm1.03 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG662408428
Side View
Table 59.0%Crown 32.9°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £991 GBP|Low: £166 GBP|High: £991 GBP|Avg: £437 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 8£166 GBP
Retailer 16£173 GBP
Retailer 3£249 GBP
Retailer 10£310 GBP
Retailer 11£316 GBP
Retailer 2£336 GBP
Retailer 6£363 GBP
Retailer 17£364 GBP
Retailer 9£404 GBP
Retailer 13£451 GBP
Retailer 15£472 GBP
Retailer 5£502 GBP
Retailer 12£585 GBP
Retailer 7£633 GBP
Retailer 14£863 GBP
Retailer 4£891 GBP
Brilliant Earth£991 GBP

41 data points across 17 retailers

25 retailers£166 GBP to £891 GBP

Retailer 1
-
£149 GBP
$198 USD
Price last confirmed 11 days ago
A
Retailer 2
-
£166 GBP
$221 USD
View
Final sale: no returns
Retailer 3
-
£173 GBP
$230 USD
View
Price last confirmed 10 days ago
Retailer 4
-
£184 GBP
$245 USD
View
Price last confirmed 13 days ago
Retailer 5
-
£184 GBP
$245 USD
View
Price last confirmed 11 days ago
Retailer 6
-
£190 GBP
$253 USD
View
Price last confirmed 44 days ago
A
Retailer 7
-
£211 GBP
HK$2,200 HKD
View
A
Retailer 8
-
£249 GBP
$332 USD
View
A
Retailer 9
-
£310 GBP
€393 EUR
View
A
Retailer 10
-
£316 GBP
ZAR 6,808 ZAR
View
A
Retailer 11
-
£336 GBP
View
A
Retailer 12
-
£363 GBP
$483 USD
View
A
Retailer 13
-
£364 GBP
$485 USD
View
B+
Retailer 14
-
£404 GBP
A$828 AUD
View
Retailer 15
-
£445 GBP
$592 USD
View
Price last confirmed 8 days ago
B+
Retailer 16
-
£451 GBP
A$923 AUD
View
B+
Retailer 17
-
£472 GBP
$629 USD
View
B+
Retailer 18
-
£502 GBP
SGD 903 SGD
View
B+
Retailer 19
-
£585 GBP
A$1,199 AUD
View
Retailer 20
-
£592 GBP
$789 USD
View
Price last confirmed 12 days ago
B+
Retailer 21
-
£633 GBP
$842 USD
View
B
Retailer 22
-
£863 GBP
View
B
Retailer 23
-
£891 GBP
$1,187 USD
View
Retailer 24
-
£991 GBP
$1,320 USD
View
Price last confirmed 12 days ago
Most Expensive
Brilliant Earth
12191560A · Oct 21
£991 GBP
$1,320 USD
View
Price last confirmed 8 days ago
24 more retailers have this diamond
Prices start from £166 GBPSave up to £725 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.03ct Round
£166 GBP